Likely situations for fence and exclude from grazing

1.         Salinity and waterlogging
Samphires are highly salt-tolerant once established and typically of halophytes, the pattern of growth is lower when salinity is low, increasing to an optimum with an ECe of ~10 dS/m, and then gradually declining as ECe values reach 40 dS/m.  Samphires can grow in soils that are more or less permanently waterlogged in winter, and some species can withstand up to 6 months partial inundation.  The seeds are not highly salt-tolerant and successful germination requires that soils be partly leached by rainfall and/or flood waters before germination occurs.

Most likely situations for samphire.

Subsoil salinity/ depth to watertable matrix

Winter

Summer

 

 

Drivers of plant zonation

  • Shallow rooted halophyte
  • Tolerates high waterlogging, even inundation in winter
  • Growth depends on groundwater accessible to roots
  • Germinates after flooding
  • Rainfall variable

Key to symbols

red dot

This is the zone most preferred by samphire and where this Saltland Solution is highly recommended.

red ring

Samphire will most likely survive in this zone, but its growth will be poor and uncompetitive with other plant options.


2.         Climate and soils
Samphires are endemic across southern Australia and are well adapted to a range of soil, temperature and rainfall conditions – including extreme heat and salinity, hard frosts and hard baked clays, and sites that are more or less permanently waterlogged. 
Samphire habitats traditionally included salt lakes and pans, salt marshes and coastal flats, but have now expanded into areas of secondary salinisation.

3.         Indicator species
Most sites suited to samphire will already have samphire present because few other plants can tolerate such high levels of salinity and waterlogging.  These sites will often be bare if livestock have access but may be supporting plants such as cotula, curly ryegrass, grasswort or puccinellia.

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